US4538836A - Union for medical instruments or pipes and a female half of such a union - Google Patents

Union for medical instruments or pipes and a female half of such a union Download PDF

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Publication number
US4538836A
US4538836A US06/366,686 US36668682A US4538836A US 4538836 A US4538836 A US 4538836A US 36668682 A US36668682 A US 36668682A US 4538836 A US4538836 A US 4538836A
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United States
Prior art keywords
spigot
nosepiece
union
socket
locking
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Expired - Lifetime
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US06/366,686
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English (en)
Inventor
Viktor Krutten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fresenius SE and Co KGaA
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Fresenius SE and Co KGaA
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Assigned to FRESENIUS AG, reassignment FRESENIUS AG, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KRUTTEN, VIKTOR
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A61M2039/1033—Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/921—Snap-fit

Definitions

  • the present invention is with respect to a union for medical instruments or pipes such as catheters, probes and flexible piping generally, more specially for injection, transfusion or infusion.
  • a union for medical instruments or pipes such as catheters, probes and flexible piping generally, more specially for injection, transfusion or infusion.
  • the present invention is more specially directed to a union for pipes, it is to be kept in mind that its teachings may generally be used in the design of fastener-like unions without any fluid connection function.
  • the sort of union on which the present invention is more specially based is one having a male half with a solid or hollow spigot of generally round cross-section and having at least one radial nosepiece on its outer face.
  • the union of the invention is furthermore made up of a female part with a middle axis socket for taking up the spigot of the male half, the socket having at least one locking nosepiece in the path of motion of the radial nosepiece on the spigot when the spigot is moved into the socket.
  • the locking nosepiece of the female half is such as only to let the spigot be pushed home into the socket when elastic deformation takes place, that side of the locking nosepiece which is to the back (as seen in the direction of motion of the spigot when moved into position) having a stop face for acting against a back stop, the word "back" again being used in connection with the direction of motion of the spigot into the socket, for acting on such radial nosepiece and locking it into place.
  • the invention is furthermore directed to the female half of the union as such.
  • the most common make of union or coupling on these lines used in the field is the Luer or Record union, which generally has, on the one half, a union nut, which may be separate or fixed to an instrument, with generally a double-start thread with a helix angle of 12° and within this thread there is a coned pin part with a duct running therethrough.
  • the male half of the union is in the form of a coned spigot with an inner face or bore having the same cone angle, and in the joined-up condition of the union the male half is slipped on the outer coned face of the pin part so as to be rested fluid-tightly against it, that is to say when the male half has its circumferential wall in the space between the thread and the coned pin part.
  • the male half On its outer face the male half has nosepieces, like small lengths or pieces of a screwthread, which are screwed into the two-start female thread of the union nut so that, on turning the female and male halves in relation to each other, such nosepieces will be screwed into the female thread till the pin part is moved right home into the coned spigot or sleeve.
  • the union nut is joined to a cylindrical stem while the male half is in the form of a cylindrical spigot if the one part is fixed, after being moved right home, in relation to the other by radial stops for example, or if the union is not to be fluid-tight.
  • the male half with the nosepieces thereon is placed against the female thread of the female half and then the male half is screwed into the female half until, because of the slipping motion of the spigot of the male half in an axial direction in relation to and on the pin of the female half, the union has been done up to the desired degree.
  • nosepieces are placed at the distal end of the male half (that is to say at its end furthest from the apparatus to which it is joined) so as to make certain that the nosepieces are taken up in the female thread once the male half has only been slipped a small distance into the union nut and overlapped thereby.
  • the front, uncovered spigot of the male half is pushed into the female half so that the spigot is taken up in a coupler of the proximal end of the female half.
  • the male half is slipped in until its proximal nosepiece has been moved past the distal locking nosepieces (with elastic deformation) on the female half and has snapped in or detented in on the proximal side thereof.
  • the distal part of the female half that is to say the part furthest from the apparatus with which it is joined
  • the spigot may be pulled clear of the female half and furthermore, if the union is acted upon by a bending force, the proximal locking nosepiece of the female half will be bent because of this so that leaking is likely when the union is acted upon by bending forces and, in fact, the union may be completely separated. In any case, if pulled upon and bent at the same time, the connection will very quickly be broken.
  • the union of the said German specification 2,657,215 is made with specially matching female and male halves, which may not be used with other makes of unions.
  • the male half may in no case be used with a screwunion part, as for example part of a Luer-Lok union and if the male half is to be joined up with some other part of the apparatus, it is necessary for all such parts to have female halves of matching design.
  • connection parts as for example female halves of standard unions such as Luer unions, and have to be changed in design if they are to be used with a spigot of the union of the said German patent specification 2,657,215; such changes in the design or even the use of a special adapter piece having one end matching the union of German specification 2,657,215 and the other end matching a Luer union, are naturally complex.
  • one purpose of the present invention is that of designing a union of the sort noted which may be quite readily designed so that it may not be separated.
  • a further object or purpose of the invention is that of designing a union male and female halves of which are regularly and truly fixed in relation to each other.
  • a further purpose of the invention is that of designing a union which is resistant to pulling and bending forces.
  • a still further purpose of the present invention is that of making a union female half of which may be used with spigots of industry standard screw-unions, more specially Luer unions.
  • the radial nosepiece is placed at the distal end of the spigot of the male half, that is to say at the end thereof furthest from the apparatus with which it is joined, said radial nosepiece stretching around the spigot for an angle of less than 180° and more specially less than 90°
  • the female half has a guide structure between the locking nosepiece and its distal end, said guiding structure walling in the female opening socket of the female half, and furthermore there is an axial guiding opening for inward motion of the nosepiece on the spigot, for doing up the union, such a guiding opening or channel being on the inner side of the wall of the guide structure.
  • the guiding opening has the locking nosepiece of the female half at its proximal end, that is to say the end nearest to the apparatus with which the female half is joined.
  • the nosepiece on the male half is placed at the distal end of the spigot of the male half, unlike the male half of the union of the said German specification 2,657,215. That is to say the nosepiece is placed at a position at which the threaded parts forming keeper nosepieces, are placed in standard Luer unions.
  • the female half has a guide structure between the locking nosepiece thereon and its distal end, such guide structure being placed around the spigot of the male half for guiding the same.
  • the locking nosepiece may readily be so designed that the union produced may be hard to undo by hand, even though this is still possible without needing any tools, if this is needed on a case-to-case basis.
  • the locking nosepiece in the female half may have distal ramps thereon up which the spigot nosepiece is run so that the locking nosepiece is bent, if the force is great enough, while the proximal face of the locking nosepiece has a different slope, for example in a radial plane so that, on making an attempt at pushing back the spigot nosepiece, a locking connection or stopping effect is produced and the union may, in fact, not be undone again.
  • the clearance width of the guide structure has to be less than the radial size of the nosepiece or nosepieces at the distal end of the spigot.
  • the spigot nosepiece or nosepieces to be moved through the guide structure on doing up the union there is at least one axial opening or channel at the inside of the wall of the guide structure, through which the spigot nosepiece may be moved through the axial part of the guide structure.
  • the circumferential size of the spigot nosepiece makes an angle of markedly less than 180° and, for example, may be limited to an upper value of 160° so that on making the guide channel (designed for taking up the spigot nosepiece) of the right size circumferentially, there will be a great enough support face or land on the inner side of the circumferential wall of the guide structure giving full supporting and guiding function on the outer face of the spigot.
  • the spigot will have at least two diametrally opposite nosepieces thereon, each having a limited circumferential extent of for example 90° or less, which may be slipped into specially designed guide openings in the female half, and between such openings there will be guide lands for guiding the outer face of the spigot on the male half.
  • a male half as used in a union of the present invention may, without any trouble and quite simply, be so designed that it may be used with a union nut of normal screw-unions like Luer unions or the like, even if it is different in some respects from the standard, specialpurpose male halves of such unions and, to take an example, has a different geometry of the spigot nosepieces.
  • female union halves of the present invention it is naturally possible for female union halves of the present invention to be produced which are not designed, in certain cases, for functioning with industry standard male screw-union parts, if this is not needed in certain cases and, for example, makes it simpler for the union halves to be produced, such a simpler design outweighing limiting the field of use of such parts.
  • connection of the union of the present invention may take place without any turning of the male and female halves in relation to each other and in fact by making the guide openings longer and stretching past the locking nosepieces, the design may be such that no twisting of the male half in relation to the female half is possible. Furthermore, the union of the present invention takes up little space in a radial direction, because the guide structure of the female half is only a bit larger in diameter than the outer diameter of the spigot nosepiece or nosepieces, the same sticking out only some millimeters radially from the outer face of the spigot part of the male half.
  • the circumferential size of the complete union is only larger than the lumen of the duct running through the spigot from end to end by an amount equal to the radial size of the spigot nosepieces and the wall thickness of the guide structure of the female half radially without the guide opening and the wall thickness of the spigot of the male half.
  • the design may be made to give further guiding effects and to give a greater resistance to bending loads if the female half has a pin in the axial part of its guide structure which, on doing up the union, is taken up into the distal end of the duct through the male half and the circumferential wall of the spigot of the male half takes up a position between the outer face of the pin and the inner face of the circumferential wall of the guide structure of the female half.
  • the last-named may, in this case, have a duct running therethrough as well and through the spigot, so producing a fluid connection with the duct running through the male half.
  • the outer face of the pin of the female half and the inner face of the duct through the spigot of the male half may be made use of for circumferentially sealing off this fluid connection, in which respect, in the same way as in the Luer Lok or Record union, the circumferential wall of the duct through the male half and/or the circumferential outer face of the pin are coned in order to give a fluid-tight interference fit and seating effect.
  • FIG. 1 is a side view of a female half of a union or coupling of the present invention.
  • FIG. 2 is a side view of the male half for use therewith.
  • FIG. 3 is an end-on view of the female half of FIG. 1 looking in the direction of arrow III in it.
  • FIG. 4 is an end-on view of the male half of the union of FIG. 2 looking in the direction of arrow IV in it.
  • FIG. 5 is a section through the female half as in FIGS. 1 and 3 on the line V--V in FIG. 3, the pushed-home male part being marked in chained lines in its position in relation to the female half.
  • FIGS. 1 and 2 the reader will see on the left hand side a female half 1 and in FIG. 2 a male half 2 for use therewith as a union and able to be put together by being moved in the direction of arrows 3 and 4 axially so that the distal or left hand of male half 2 (the end furthest from the apparatus with which it is fixed) is moved into the distal or right hand end of female half 1.
  • the female half which may be seen on a larger scale in FIG. 5 as a section on the line V--V of FIG. 3, and which may be put on the market as a separate part, has a base part 5, a guide structure 6 and, therebetween, a keeper part 7.
  • a piece of hose is so joined up with the base part 5 that the bore within the hose is joined up with a duct 8 running through the base part 5 coaxially.
  • the duct 8 is designed running through the keeper part 7 and the guide structure 6 in a male pin 9 (forming part of the female half 1) running coaxially through the guide structure 6.
  • the male half 2 as well has a base part 10, a spigot 11 and a part 12 between them joining them together.
  • the male half 2 is generally sleeve-like and has, in the present working example an inner duct 13 running therethrough, which, at any rate, in the spigot 11 has a bore which makes it possible for the pin 9 of the female half 1 to be run into it.
  • the radially outer face of the pin 9 and/or the radially inner wall face of the duct 13 in the spigot 11 may, in a known way, be coned with a cone angle of 1:10 or 1:16.67 for Record unions and, in the second case, for Luer unions to make certain of a fluid-tight pressing fit and seating effect between the two faces.
  • the outer face of the pin 9 and the inner wall of the duct 13 may be cylindrical so that the inner wall of the duct 13 may be simply slipped along the outer face of pin 9 without any jamming effect while on the other hand with the smallest possible play.
  • a radial guiding effect on the spigot 11 of the male half 2 on the outer face of the pin 9, the duct 13 in the male half 2 being outside the spigot 11, that is to say the axial part of the pin 9 might be made solid without any duct, if no fluid connection is desired.
  • the union is designed for connections with a fluid and the outer circumferential face of the pin 9 is coned towards the front end of the female half or it may become narrower with a slope or angle of 1:16.67 as is normal for Luer unions.
  • the duct 13 of the male half 2 is cylindrical in the spigot 11, is placed round the front end of the pin 9 with a play therebetween, while the back part gives a fluid-tight interference fit.
  • the circumferential wall of the duct 13 in the spigot 11 of the male half 2 is coned so as to become wider towards the front or distal end of the male half 2 so as to make generally flat contact against the circumferential face, becoming narrower in the same direction of the pin 9.
  • the wording "front" (or distal" end of the female half 1 and of the male half 2 is used for that end, which is nearest the other half of the union so that the arrow 3 with respect to the female half and the arrow 4 used in connection with the male half 2 are each pointing in the "distal" or front direction.
  • nosepieces 14 which are diametrally oppositely placed on the outer face of the spigot 11.
  • Such nosepieces 14 have, in the present example, back faces 15 (see FIG. 2) with a helical angle, that is to say an angle with respect to a transverse plane, of for example 12°, this being in line with the thread helix angle of a normal union nut of a Luer union. This is responsible for the best possible union function when the male half 2 with its spigot 11 is screwed into the union nut of a Luer union.
  • a male half 2 of the sort detailed in the figure is even used for such a Luer union so that, for the male half 2 of a union of the present invention it is possible to make use of, if needed, the male half, presently marketed, for such Luer connections.
  • each spigot nosepiece 14 has an angular extent in the circumferential direction which is somewhat less than 90° and side stop ends, facing in the circumferential direction, 16 and 17 and on the back or proximal side, with reference to the direction of arrow 4 of putting in the male half, of nosepiece 14, a stop 18, which in the present example is formed by an edge, which is produced between a side face, forming the stop end 16 and the sloping back face 15 of the nosepiece 14 on the spigot.
  • the function of the stop ends 16 and 17 and of the stop 18 will be made clear later on herein.
  • the guide structure 6 has four guide openings 22 or channels, equally spaced, that is to say with a center angle therebetween of 90°, there being guide lands 23 between the guide openings, the spigot nosepieces 14 being truly and regularly guided axially in the guide opening 22, as is marked in chained lines in FIG. 3.
  • the keeper part 7 of the female half 1 has, in line with the guide openings 22, pockets 24, which are placed on the circumferential face of the wall of the keeper part 7 between lands 25, such lands being further parts of guidelands 23.
  • the design of the pockets 24 as radial openings is not necessary in all cases but, however, is simple from the production engineering point of view and makes it readily possible to see by eye if the spigot nosepieces 14 are fully positioned and seated in pockets 24.
  • Pockets 24 have two circumferentially opposite stop ends 26, 27 for use with the stop ends 16 and 17 of the spigot nosepieces 14 so that, when such spigot nosepiece 14 has been pushed home, there is no chance of it being turned in any one of the pockets 24.
  • each guide opening 22 there is a locking nosepiece 28 (which in the present example is near the guide land 23), locking nosepiece 28 running out into the path along which the spigot nosepiece 14 is pushed into the female half.
  • Locking nosepieces 28 may have sloping ramp faces on their proximal or front sides (thought of in connection with the direction of arrow 3) as will be seen in the sectioned part of FIG.
  • the locking nosepiece 28 may be bent radially outwards with deformation of the circumferential wall 19 (made thin for this purpose) of the guide structure 6. Furthermore, the material of the locking nosepiece 28 may be radially forced outwards as well. Dependent on the material thicknesses used in the design it is then possible, at the same time, for each spigot nosepiece 14 to be bent springingly inwards, the circumferential wall 21 of the spigot 11 of male half 2 being bent to a small degree.
  • spigot nosepieces 14 are present, lined up with the guide openings 22 (such spigot nosepieces having the same axial position on the spigot 11 of male half 2), the male half 2 will be symmetrically supported and locked against stops 18 so that the half is regularly and safely locked in position.
  • the base-parts 5 and 10 of the female half 1 and, on the other hand, of the male half 2, are so designed in relation to each other that the base-part 10 of the male half 2 may be placed on base-part 5 of the female half 1 and joined thereto, for example adhesively, as marked in chained lines in FIG. 5, the outcome being a connection unit which, at one end, may be used for taking up a further male half 2, as is marked in chained lines in FIG. 5, while at the other end a female half 1 may be slipped into it.
  • ends of pipes may be joined up with end fittings designed like the base-parts 5 and 10 so that they may be fixed on a different form of base-part 10 or 5 or, for example, by adhesive, so that the ends of the pipes may be joined up in the one case with a female half 1 and on the other hand with a male half 2 so that a connection may be made between them using the union of the present invention.
  • base-parts quite different from parts 5 or 10 to be used, such further designs being in line with the form of the parts, not needed for producing the connection of the female half 1 and the male half 2, on a case-to-case basis.
  • the union of the present invention may be used in all cases in which in the field Luer or Record couplings have been used.
  • a fluid-tight or non-fluid-tight connection may be produced between the female half 1 and the male half 2 by simply driving home the male part which becomes detented in position.
  • An important point in this respect is that the spigot nosepieces 14, placed at the front or distal end of the spigot 11 of the male half 2 are pushed through the guide structure 6 and locked in position at the back thereof on the locking nosepieces 28, whereas the guide part 6 with the guide lands 23 is placed round the outer circumferential face of the spigot 11 with a small play between the two.
  • the male half 2 may, if needed, be joined up with any number of female Luer union parts with union nuts and then pushed into a female part 1 of the present invention so as to be unseparably joined therewith.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Clamps And Clips (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
US06/366,686 1981-04-13 1982-04-08 Union for medical instruments or pipes and a female half of such a union Expired - Lifetime US4538836A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3114937 1981-04-13
DE3114937A DE3114937C2 (de) 1981-04-13 1981-04-13 Anschlußvorrichtung für medizinische Instrumente oder Leitungen

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US4538836A true US4538836A (en) 1985-09-03

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US06/366,686 Expired - Lifetime US4538836A (en) 1981-04-13 1982-04-08 Union for medical instruments or pipes and a female half of such a union

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Country Link
US (1) US4538836A (ja)
EP (1) EP0063333B1 (ja)
JP (1) JPS5813216A (ja)
DE (2) DE3114937C2 (ja)

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US10215315B2 (en) 2008-09-05 2019-02-26 Parker-Hannifin Corporation Tube compression fitting and flared fitting used with connection body and method of making same
US10695550B2 (en) 2011-05-20 2020-06-30 Excelsior Medical Corporation Caps for needleless connectors
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US10821278B2 (en) 2014-05-02 2020-11-03 Excelsior Medical Corporation Strip package for antiseptic cap
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Also Published As

Publication number Publication date
JPS5813216A (ja) 1983-01-25
DE3274803D1 (en) 1987-02-05
EP0063333A2 (de) 1982-10-27
DE3114937C2 (de) 1985-08-22
EP0063333B1 (de) 1986-12-30
EP0063333A3 (en) 1984-02-01
JPH0260884B2 (ja) 1990-12-18
DE3114937A1 (de) 1982-10-28

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